Misc: Zorro was the secret identity of what wealthy landowner?

Questions

Whose most recent book is called 'The Brethren'?

In the Bible, who was Sarah's Egyptian servant, the mother of Ishmael?

Which unit is defined as the power necessary to lift 33,000 pounds a distance of 1 foot in 1 minute?

On a music score what name is given to the key and meter (or time) signs at the beginning of a composition?

What colour is the circle on the flag of Bangladesh?